But dreaming never hurt anyone. We've compiled a list of some of the most outrageously expensive things you could do and buy — with a clean conscience — if you were to take home the insane $1.5 billion Powerball lottery jackpot.

Even if you made these purchases, you'd still have a lot of cash left over.

You could start small, picking up the most expensive ride in the world: the 1962 Ferrari 250 GTO. Recently sold at auction for $38 million, the GTO would barely make a dent in a lottery winner's net worth.

When you're ready to start spending, a private jet would be a good way to go. While normal top-of-the-line jets go for the $65 million range, as a lottery winner you might want to consider the $500 million Airbus A380.

For $1 billion of your winnings, you could try your hand in real estate by buying out Antilia, the most expensive home in the world. The 27-story tower, in Mumbai, India, is 400,000 square feet and has three helicopter pads and an underground parking garage. It's not on the market, though — it's currently owned by energy magnate Mukesh Ambani, India's richest man.

You might want to escape for a while. There's no better place to do so than on Necker Island, built and owned by Virgin Group founder Sir Richard Branson. Necker will run you $78,000 a night for you and 33 of your closest friends, which shouldn't strain a Powerball winner's wallet.

For the casual billionaire, space might be the next frontier for a weekend getaway. With a mere $1.4 million, you could travel to the edge of space — and back — on a Virgin Galactic shuttle with Leonardo DiCaprio as your co-passenger, or skip the celebrity and focus on the real stars for just $200,000 per flight.

Timepieces are a mark of status. Show yours with one of Patek Philippe's unique watches, like the Henry Graves Supercomplication, which sold at auction for $11 million in 1999.

Luck waxes and wanes, but diamonds are forever. The 12-carat Blue Moon diamond sold for over $48 million this year to a Hong Kong businessman, making it the world's most expensive diamond — and something you might want to try to add to your collection.

Make a splash on the art market by picking up a big-name piece. This Pablo Picasso, "Les Femmes d'Alger," recently sold for $179 million, making it the most expensive piece of art in the world — and meaning that almost any storied artwork would be within the grasp of the Powerball winner.